The OM626 engine is a 4-cylinder in-line diesel engine. Displacement 1.6 liters, common rail direct injection, piezo injectors, 4 valves per cylinder, DOHC, (dual) turbocharging, intercooler. Cast iron block and aluminum cylinder head. For vehicles with a longitudinal power unit.
The engine is equipped with an EGR system. The outlet gases enter the particle filter, are cooled and re-fed to the compressor. Subsequent treatment is carried out using a selective neutralizer (SCR). Thanks to this and other solutions, the engine complies with the Euro-6 environmental standard.
Specifications
| Production years | 2014-2018 |
| Displacement, cc | 1598 |
| Fuel system | Common Rail |
| Power output, hp | 115 – 136 |
| Torque output, Nm | 280 – 320 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 80 |
| Piston stroke, mm | 79.5 |
| Compression ratio | 15.7 |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Turbocharging | yes |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 5.9 |
| Fuel type | diesel |
| Euro standards | EURO 6 |
| Fuel consumption, L/100 km | 3.8 – 4.2 |
| Weight, kg | 177 |
| CO2 emission, g/km | 99 – 110 |
| Start-stop system | yes |
The engine was installed on:
- Mercedes C-Class W205 in 2014 – 2018 (C 180 d and C 200 d).
Disadvantages of the OM626 engine
- The engine is a version of the Renault R9M, whose timing chain can stretch by 150,000 km;
- The EGR valve gets dirty very quickly;
- Oil leaks are also encountered regularly.
Frequently asked questions about the Mercedes OM626
How much power does the Mercedes OM626 make?
The Mercedes OM626 develops 115 - 136 hp and 280 - 320 Nm of torque.
How much oil does the Mercedes OM626 take and which one?
Engine oil capacity: 5.9 liters. Recommended oil: 5W-30.
Does the Mercedes OM626 have a timing belt or chain?
The Mercedes OM626 uses a timing chain.
Is the Mercedes OM626 turbocharged?
Yes, the Mercedes OM626 is turbocharged.
Does the Mercedes OM626 need valve clearance adjustment?
No, the Mercedes OM626 has hydraulic lifters, so the valve clearances do not need to be adjusted.
What cars was the Mercedes OM626 installed on?
Mercedes C-Class W205 in 2014 - 2018 (C 180 d and C 200 d).
What are the common problems of the Mercedes OM626?
The engine is a version of the Renault R9M, whose timing chain can stretch by 150,000 km. The EGR valve gets dirty very quickly. All known problems.
